Coal gangue is the main pollution source of mining areas. When coal gangue is stacked and recycled, the heavy metal elements contained in it are released by natural weathering and leaching, which causes damage to the surrounding ecological environment. In this study, the leaching and precipitation characteristics of heavy metals in low-sulfur coal gangue under different environmental conditions were simulated by indoor dynamic leaching experiments, which provided a theoretical basis for environmental restoration of the mining area. The conclusions are as follows: higher heavy metal content in low-sulfur coal gangue is associated with greater, leaching of heavy metals; acidic conditions promote the release of heavy metals in low-sulfur coal gangue; and more precipitation is associated with better release of heavy metals from the low-sulfur coal gangue.

煤石是矿区的主要污染源。堆放和回收煤石时，其中的重金属元素会通过自然风化和浸出而释放出来，从而对周围的生态环境造成破坏。通过室内动态浸出实验模拟了不同环境条件下低硫煤石中重金属的浸出与沉淀特性，为矿区环境恢复提供了理论依据。结论如下：低硫煤石中较高的重金属含量与较高的重金属浸出有关。酸性条件促进了低硫煤石中重金属的释放；